// Pango.ScriptIter
//
// Copyright (c) 2005 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General 
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.

namespace Pango {

	using System;
	using System.Runtime.InteropServices;

	public class ScriptIter : GLib.Opaque {

		IntPtr native_text;

		public ScriptIter(IntPtr raw) : base(raw) { }

		[DllImport("pango-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
		static extern IntPtr pango_script_iter_new(IntPtr text, int length);

		public ScriptIter(string text) {
			native_text = GLib.Marshaller.StringToPtrGStrdup(text);
			Raw = pango_script_iter_new(native_text, -1);
		}

		[DllImport("pango-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
		static extern void pango_script_iter_free(IntPtr raw);

		~ScriptIter() {
			GLib.Marshaller.Free(native_text);
			pango_script_iter_free(Raw);
			Raw = IntPtr.Zero;
		}

		[DllImport("pango-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
		static extern void pango_script_iter_get_range(IntPtr raw, out IntPtr start, out IntPtr end, out Pango.Script script);

		[DllImport("glib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
		static extern IntPtr g_utf8_pointer_to_offset(IntPtr str, IntPtr pos);

		public void GetRange(out int start, out int len, out Pango.Script script) {
			IntPtr start_ptr;
			IntPtr end_ptr;

			pango_script_iter_get_range(Handle, out start_ptr, out end_ptr, out script);
			start = (int)g_utf8_pointer_to_offset(native_text, start_ptr);
			len = (int)g_utf8_pointer_to_offset(start_ptr, end_ptr);
		}

		[DllImport("pango-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
		static extern bool pango_script_iter_next(IntPtr raw);

		public bool Next() {
			return pango_script_iter_next(Handle);
		}

		[Obsolete("Replaced by garbage collection")]
		public void Free() {
		}
	}
}